I didn't register my Macbook when I turned it on for the first time. Later that day, I clicked on "Send Registration" in my folder. It was in the middle of the night so I don't remember it very well (I was almost sleeping). I'm pretty sure it didn't want me to write MacBook serial number there, so I tried to register via Apple website today's afternoon. Everything was ok but no confirmation e-mail has come. Should I be worried? Is my MacBook registered or not?